Exercise mat



FIG. 1 is a perspective view of my new design for an exercise mat;

FIG. 2 is a top plan view of the design of FIG. 1;

FIG. 3 is a bottom plan view of the design of FIG. 1;

FIG. 4 is a left side elevational view of the design of FIG. 1;

FIG. 5 is a right side elevational view of the design of FIG. 1;

FIG. 6 is a front view of the design of FIG. 1; and,

FIG. 7 is a rear view of the design of FIG. 1. 

The ornamental design for the exercise mat, as shown and described. 